Presentation on theme: "Bell Work Put in Scientific Notation 360 000000 g __________________ 48000 m ______________________.000056 cm ____________________ 3.5 X 10 7 (DO THE OPPOSITE)___________."— Presentation transcript:
Bell Work Put in Scientific Notation g __________________ m ______________________ cm ____________________ 3.5 X 10 7 (DO THE OPPOSITE)___________ Top of page 15
DIMENSIONAL ANALYSIS PAGE 13 OF NOTEBOOK Scientific Notation &
Ojective: Write numbers in Scientific Notation Evaluate word problems using Scientific Notation Evaluate Dimensional Analysis
Main Idea Read Aloud Page 40
WHAT IS SCIENTIFIC NOTATION? SCIENTIFIC NOTATION: A SHORT WAY TO WRITE VERY SMALL OR VERY LARGE NUMBERS 1,000,000,000,000 cm 1.0 X cm
Rules for Scientific Notation 1. Put the Decimal after the 1 st digit and drop the zeroes To find the exponent count the number of places from the end of the number x 10 3 Page 12
Guided Practice: Turn to Page 40 in your chemistry text book Example Problem 2.2: The diameter of the sun is 1,392,000 km The density of the sun’s lower atmosphere is g/cm3
Multiplication Division 1. Multiply Coefficients 2. Add the exponents (base 10 remains) 1. Divide the coefficients 2. Subtract Exponents (base 10 remains). Rules for Multiplication/Division in Scientific Notation Page 14
What is Dimensional Analysis? A systematic approach to solving problems that using conversions factors. Conversion factor-ratio of equivalent factors Example:1000 meter = 1 kilometer or 1km 1000m Reciprocal ?
Guided Practice Page 45; Problems
Classwork/The Price of Gasoline Assume that the Gasoline in Europe cost $0.989 per liter and the current price is $2.59 per gallon in the United States. Which country has the lowest price. 1L = 1 quart4 quarts = 1 gallon
Answer to Group Activity 1 $3.96 /gallon The European Gas is extremely expensive.
Extra-Credit/Cooking Conversion The density of peanut oil is g/mL. There are 237 mL in a measuring cup. If a recipe calls for ¼ cup of peanut oil, How many grams of peanut oil are required(hint:.250= ¼ ) ?